Carnival Corporation operates as a leisure travel company in North America, Australia, Europe, and Asia. It operates in four segments: North America and Australia Cruise Operations, Europe and Asia Cruise Operations, Cruise Support, and Tour and Other. The company operates cruises under the Carnival Cruise Line, Princess Cruises, Holland America Line, P&O Cruises (Australia), Seabourn, Costa, AIDA, P&O Cruises (UK), and Cunard brand names. It also owns Holland America Princess Alaska Tours, a tour company in Alaska; and the Canadian Yukon, which owns and operates hotels, lodges, glass-domed railcars, and motor coaches. In addition, the company is involved in the lease of cruise ships. It sells its cruises primarily through travel agents and tour operators. Carnival Corporation was incorporated in 1972 and is headquartered in Miami, Florida.